- Obituary (1593 Hits)
- Obscurity (2694 Hits)
- Officium Triste (1236 Hits)
- Omission (1130 Hits)
- Omnium Gatherum (49 Hits)
- Onheil (709 Hits)
- Onkel Tom Angelripper (774 Hits)
- Onslaught (1402 Hits)
- Oppressus (1389 Hits)
- Orae (1259 Hits)
- Orden Ogan (1187 Hits)
- Out For Blood (819 Hits)
- Outrage (JPN) (190 Hits)
- Overkill (1153 Hits)
- Ozzy Osbourne (1311 Hits)